#10042: Doctest failure in sage/rings/polynomial/polynomial_element.pyx
-------------------------------+--------------------------------------------
Reporter: mpatel | Owner: mvngu
Type: defect | Status: needs_work
Priority: blocker | Milestone: sage-4.6
Component: doctest | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: report upstream |
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Comment(by drkirkby):
Replying to [comment:46 zimmerma]:
> Dave, you might try to recompile the lapack spkg with {{{-O0}}} instead
of the default
> {{{-O3}}}.
>
> Paul
I'll try that Paul. The Lapack package is a real mess.
* It's probably a snapshot taken from CVS, given it has the date in it,
but no version number.
* It's almost 3 years old, but the last Lapack was released in 30th June
2010
* The Mercurial repository is basically useless.
{{{
drkir...@hawk:~/sage-4.6.alpha3/spkg/standard/lapack-20071123.p1$ hg
status | head
M spkg-install
? spkg-install~
? src/BLAS/SRC/Makefile
? src/BLAS/SRC/caxpy.f
? src/BLAS/SRC/ccopy.f
? src/BLAS/SRC/cdotc.f
? src/BLAS/SRC/cdotu.f
? src/BLAS/SRC/cgbmv.f
? src/BLAS/SRC/cgemm.f
}}}
{{{
drkir...@hawk:~/sage-4.6.alpha3/spkg/standard/lapack-20071123.p1$ cat
SPKG.txt
MAINTAINERS:
Josh Kantor
William Stein
drkir...@hawk:~/sage-4.6.alpha3/spkg/standard/lapack-20071123.p1$
}}}
I did a build of the old lapack with -O0, but it made no difference. I've
tried my noddy C program with compiler options like -mfpmath=387 &
-mfpmath=sse -m32 and -m64, but nothing changes the output.
The problem is a lot in Sage depends on lapack, so I think a total rebuild
is in order in this case. That includes ATLAS on this system, which takes
nearly 2 hours to build in 32-bit mode, as there's no tuning data for my
Xeon W3580 on 32-bit builds. On 64-bit builds, ATLAS builds in about 8
minutes.
There must be a pretty good case for updating Lapack very soon, if not in
this release. As this ticket is a blocker, in the event an updated lapack
solves it, then I think that would be worth doing.
Dave
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10042#comment:47>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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